[Pacemaker] Suicide fencing and watchdog questions

[Andrew Beekhof]

> On 27 Nov 2014, at 4:24 pm, Vladislav Bogdanov <bubble at hoster-ok.com> wrote:
> 
> 27.11.2014 03:43, Andrew Beekhof wrote:
>> 
>>> On 25 Nov 2014, at 10:37 pm, Vladislav Bogdanov <bubble at hoster-ok.com> wrote:
>>> 
>>> Hi,
>>> 
>>> Is there any information how watchdog integration is intended to work?
>>> What are currently-evaluated use-cases for that?
>>> It seems to be forcibly disabled id SBD is not detected...
>> 
>> Are you referring to no-quorum-policy=suicide?
> 
> That too.
> 
> But main intention was to understand what value that feature can bring
> at all.
> I tried to enable it without SBD or no-quorum-policy=suicide and
> watchdog was not fired up.

The only interaction with watchdog is via SBD.
Suicide for no-quorum-policy has always relied on fencing.

SBD will look for that value though and tailor its behaviour.

> Then I looked at sources and realized that it
> is enabled only when SBD is detected, and is not actually managed by the
> cluster option.
> 
>> 
>>> 
>>> Also, is there any way to make node (in one-node cluster ;) ) to suicide
>>> if it detects fencing is required? Technically, that can be done with
>>> IPMI 'power cycle' or 'power reset' commands - but node (and thus the
>>> "whole" cluster) will not know about fencing is succeeded, because if it
>>> received the answer, then fencing failed. But node will be hard reboot
>>> and thus cleaned up otherwise.
>>> 
>>> Best,
>>> Vladislav
>>> 
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>> 
>> 
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>> 
> 
> 
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